|
List Of Craters On Venus
This is a list of craters on Venus, named by the International Astronomical Union's (IAU) Working Group for Planetary System Nomenclature. All craters on Venus are named after famous women or female first names. ''(For features on Venus other than craters see, list of montes on Venus and List of coronae on Venus.)'' As of 2017, there are 900 named craters on Venus, fewer than the lunar and Martian craters but more than on Mercury. Other, non-planetary bodies with numerous named craters include Callisto ( 141), Ganymede ( 131), Rhea (128), Vesta (90), Ceres (90), Dione (73), Iapetus (58), Enceladus (53), Tethys (50) and Europa ( 41). For a full list, ''see List of craters in the Solar System''. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Dropped and not approved names See also * List of montes on Venus * List ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on 28 July 1919 in Brussels, Belgium and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. the Union had 85 national members and 12,734 individual members, spanning 90 countries and territories. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceres (dwarf Planet)
Ceres (minor-planet designation: 1 Ceres) is a dwarf planet in the middle main asteroid belt between the orbits of Mars and Jupiter. It was the first known asteroid, discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily, and announced as a new planet. Ceres was later classified as an asteroid and then a dwarf planet, the only one not beyond Neptune's orbit. Ceres's diameter is about a quarter that of the Moon. Its small size means that even at its brightest it is too dim to be seen by the naked eye, except under extremely dark skies. Its apparent magnitude ranges from 6.7 to 9.3, peaking at opposition (planets), opposition (when it is closest to Earth) once every 15- to 16-month synodic period. As a result, its surface features are barely visible even with the most powerful telescopes, and little was known about it until the robotic NASA spacecraft Dawn (spacecraft), ''Dawn'' approached Ceres for its orbital mission in 2015. ''Dawn'' fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mari Language
The Mari language (, ; rus, марийский язык, p=mɐˈrʲijskʲɪj jɪˈzɨk), formerly known as the Cheremiss language, spoken by approximately 400,000 people, belongs to the Uralic languages, Uralic language family. It is spoken primarily in the Mari Republic of the Russian Federation, as well as in the area along the Vyatka River, Vyatka river basin and eastwards to the Ural Mountains, Urals. Mari speakers, known as the Mari people, Mari, are found also in the Tatarstan, Bashkortostan, Udmurtia, and Perm Krai, Perm regions. Mari is the titular and official language of its republic, alongside Russian language, Russian. The Mari language today has three standard forms: Hill Mari language, Hill Mari, Northwestern Mari language, Northwestern Mari, and Meadow Mari language, Meadow Mari. The latter is predominant and spans the continuum Meadow Mari to Eastern Mari from the Republic into the Ural dialects of Bashkortostan, Sverdlovsk Oblast and Udmurtia), whereas the for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Given Name
A given name (also known as a forename or first name) is the part of a personal name quoted in that identifies a person, potentially with a middle name as well, and differentiates that person from the other members of a group (typically a family or clan) who have a common surname. The term ''given name'' refers to a name usually bestowed at or close to the time of birth, usually by the parents of the newborn. A ''Christian name'' is the first name which is given at baptism, in Christian custom. In informal situations, given names are often used in a familiar and friendly manner. In more formal situations, a person's surname is more commonly used. In Western culture, the idioms "" and "being on first-name terms" refer to the familiarity inherent in addressing someone by their given name. By contrast, a surname (also known as a family name, last name, or Gentile name, ''gentile'' name) is normally inherited and shared with other members of one's immediate family. Regnal names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hebrew Languages
The Canaanite languages, sometimes referred to as Canaanite dialects, are one of four subgroups of the Northwest Semitic languages. The others are Aramaic and the now-extinct Ugaritic and Amorite language. These closely related languages originated in the Levant and Upper Mesopotamia. Ancient Semitic-speaking peoples spoke them in an area encompassing what is today Israel, Palestine, Jordan, the Sinai Peninsula, Lebanon, Syria, as well as some areas of southwestern Turkey, Iraq, and the northwestern corner of Saudi Arabia. From the 9th century BCE, they also spread to the Iberian Peninsula and North Africa in the form of Phoenician. The Canaanites are broadly defined to include the Hebrews (including Israelites, Judeans, and Samaritans), Ammonites, Edomites, Ekronites, Hyksos, Phoenicians (including the Punics/Carthaginians), Moabites, Suteans and sometimes the Ugarites and Amorites. The Canaanite languages continued to be spoken languages until at least the 5th century but we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eponym
An eponym is a noun after which or for which someone or something is, or is believed to be, named. Adjectives derived from the word ''eponym'' include ''eponymous'' and ''eponymic''. Eponyms are commonly used for time periods, places, innovations, biological nomenclature, astronomical objects, works of art and media, and tribal names. Various orthographic conventions are used for eponyms. Usage of the word The term ''eponym'' functions in multiple related ways, all based on an explicit relationship between two named things. ''Eponym'' may refer to a person or, less commonly, a place or thing for which someone or something is, or is believed to be, named. ''Eponym'' may also refer to someone or something named after, or believed to be named after, a person or, less commonly, a place or thing. A person, place, or thing named after a particular person share an eponymous relationship. In this way, Elizabeth I of England is the eponym of the Elizabethan era, but the Elizabethan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diameter
In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It can also be defined as the longest Chord (geometry), chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length d of a diameter is also called the diameter. In this sense one speaks of diameter rather than diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius r. :d = 2r \qquad\text\qquad r = \frac. The word "diameter" is derived from (), "diameter of a circle", from (), "across, through" and (), "measure". It is often abbreviated \text, \text, d, or \varnothing. Constructions With straightedge and compass, a diameter of a given circle can be constructed as the perpendicular bisector of an arbitrary chord. Drawing two diameters in this way can be used to locate the center of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Crater
An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Impact craters are typically circular, though they can be elliptical in shape or even irregular due to events such as landslides. Impact craters range in size from microscopic craters seen on lunar rocks returned by the Apollo Program to simple bowl-shaped depressions and vast, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth. Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury (planet), Mercury, Callisto (moon), Callisto, Ganymede (moon), Ganymede, and most small moons and asteroids. On other planet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Craters In The Solar System
This is a list of officially named craters in the Solar System as named by IAU's Working Group for Planetary System Nomenclature. As of 2017, there is a total of 5,223 craters on 40 astronomical bodies, which includes minor planets (asteroids and dwarf planets), planets, and natural satellite A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are colloquially referred to as moons, a deriv ...s. All geological features of a body (including craters) are typically named after a specific theme. For completeness, the list also refers to the craters on , which naming process is not overseen by IAU's WGPSN. __NOTOC__ Amalthea (2) Ariel (17) Arrokoth (1) Callisto (141) Ceres (90) Charon (6) Dactyl (2) Deimos (2) Dione (73) Earth (190) Enceladus (53) Epimetheu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Craters On Europa
This is a list of craters on Europa. The surface of Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...'s moon Europa is very young, geologically speaking, and as a result there are very few craters. Furthermore, as Europa's surface is potentially made of weak water ice over a liquid ocean, most surviving craters have slumped so that their structure is very low in relief. Most of the craters that are large enough to have names are named after prominent figures in Celtic myths and folklore. List External links USGS: Europa nomenclatureUSGS: Europa Nomenclature: Craters {{DEFAULTSORT:List Of Craters On Europa Europa Europa Europa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europa (moon)
Europa () is a moons of Jupiter, natural satellite (moon) of Jupiter. Being observable from Earth with common binoculars it is one of the four Galilean moons. As such it is a planetary-mass moon, the smallest and least massive orbiting Jupiter, and slightly smaller and less massive than Moon, Earth's. Europa is an icy moon, being of the three icy Galilean moons the closest orbiting Jupiter. As a result it is exhibiting a relatively young surface, driven by tidal heating. Probably having an iron–nickel alloy, iron–nickel core, it consists mainly of silicate rock, with a water-ice shell. It has a very thin atmosphere, composed primarily of oxygen. Its geologically young white-beige surface is Glacial striation, striated by light Tan (color), tan cracks and streaks, with very few impact craters. In addition to Earth-bound telescope observations, Europa has been examined by a succession of space-probe flybys, the first occurring in the early 1970s. In September 2022, the Juno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tethys (moon)
Tethys (), or Saturn III, is the fifth-largest moon of Saturn, measuring about across. It was discovered by Giovanni Domenico Cassini in 1684, and is named after the titan Tethys of Greek mythology. Tethys has a low density of 0.98 g/cm3, the lowest of all the major moons in the Solar System, indicating that it is made of water ice with just a small fraction of rock. This was confirmed by the spectroscopy of its surface, which identified water ice as the dominant surface material. A further, smaller amount of an unidentified dark material is present as well. The surface of Tethys is very bright, the second-brightest of the moons of Saturn after Enceladus, and neutral in color. Tethys is heavily cratered and cut by a number of large faults and trench-like graben. The largest impact crater, Odysseus, is about 400 km in diameter, whereas the largest graben, Ithaca Chasma, is about 100 km wide and more than 2,000 km long; the two surface features may be re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
